mess.cpp: In function 'int main()': mess.cpp:92: warning: ignoring return value of 'int fscanf(FILE*, const char*, ...)', declared with attribute warn_unused_result mess.cpp:94: warning: ignoring return value of 'int fscanf(FILE*, const char*, ...)', declared with attribute warn_unused_result mess.cpp:101: warning: ignoring return value of 'int fscanf(FILE*, const char*, ...)', declared with attribute warn_unused_result mess.cpp:103: warning: ignoring return value of 'int fscanf(FILE*, const char*, ...)', declared with attribute warn_unused_result mess.cpp:108: warning: ignoring return value of 'int fscanf(FILE*, const char*, ...)', declared with attribute warn_unused_result mess.cpp: In function 'void update_aint(int, int, int, int)': mess.cpp:44: warning: 'mid' may be used uninitialized in this function